//  Copyright (c) 2020 Cisco and/or its affiliates.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at:
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

package vpp

import (
	"encoding/json"
	"unicode"

	"github.com/onsi/gomega"
	"github.com/onsi/gomega/types"
)

func BePrintable() types.GomegaMatcher {
	return gomega.WithTransform(func(s string) bool {
		return isAsciiPrintable(s)
	}, gomega.BeTrue())
}

func isAsciiPrintable(s string) bool {
	for _, r := range s {
		if r > unicode.MaxASCII || !unicode.IsPrint(r) {
			return false
		}
	}
	return true
}

func pretty(v interface{}) string {
	b, err := json.MarshalIndent(v, "", "  ")
	if err != nil {
		return err.Error()
	}
	return string(b)
}
